Chocolate Gold Coins

Found in its pure state, gold has the colour yellow. It can appear to have other colours due to the alloys mixed in it and the various proportions they are in.

White colour of metal

The properties of white gold vary depending on the amount of nickel, palladium and other metals mixed in it. Nickel is hard and strong and can be used for making rings and pins. Palladium is soft and pliable and gemstone settings can be made out of it. The term is used also for pale yellow, tinted brown and very pale rose. The customers often do not see these colours as they are hidden by rhodium plating.

Rose colour of metal

The term is used because of the cooper alloy found in the gold. This alloy gives it a somewhat reddish colour. The distinction between red, rose and pink is made by the amount of alloy that is found in the gold. This type of precious metal was popular in Russia and it was known as Russian gold. These days the term has become rare but in the nineteenth century is was very used. This red type is also known as the crown gold, the highest version has 22 karats and is used in musical instruments such as bell of brass and woodwind instruments.

Green colour of metal

This type of metal has no cooper alloys in it, just silver thus giving it its greenish yellow colour.

Black, purple and blue colour of metal

This is actually normal gold that is coloured black for aesthetic reasons only. It is mostly used in jewelry. This precious metal can become black by electroplating, platination and chemical vapor deposition. Recently a new laser technique has been discovered that makes its surface black.

Purple gold, sometimes called violet gold, is an alloy of the pure metal and aluminum. It is frail and because of this it can shatter easily. Jewelers usually use it as a gem. The blue version is also a mixture of gold and indium.

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